Sandhya,

Statistics are always created and updated with an index:

SELECT [schema_name] = SCHEMA_NAME(T.[schema_id]),

table_name = T.name,

T.type_desc,

index_or_statistics_name = S.name,

is_auto_stats = S.auto_created,

user_created = S.user_created,

last_updated = STATS_DATE(T.[object_id], S.stats_id)

FROM sys.tables T

JOIN sys.stats S

ON S.[object_id] = T.[object_id]

ORDER BY

T.[schema_id],

T.name,

S.stats_id;